"Alan Gauld" <[EMAIL PROTECTED]> wrote 
> 
> class Master:
> 
> class PublishedMaster(Master):
> 
> class client:
> 
> This allows the subscriber classes to be informed of any changes

I should have pointed out that the code I posted was not tested
and should be treated as pseudo code - albeit very close to 
real code! 

Alan G.

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